# How effective is WIndscribe FF extension?

**URL:** https://discuss.privacyguides.net/t/how-effective-is-windscribe-ff-extension/23549
**Category:** Questions
**Created:** 2024-12-29T10:06:43Z
**Posts:** 3

## Post 1 by @Banjaie — 2024-12-29T10:06:43Z

Any way a site is able to determine my device IP?

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## Post 2 by @an9 — 2024-12-29T17:24:17Z

Yes, through WebRTC technology. Enable WebRTC Slayer in the extension to resolve the leak.

Also be aware that the extension in Chrome leaks the DNS resolver of your ISP originating if you only use the extension **OR** your first hop if you have the application installed on the Desktop. This not affect Windscribe Extension in FF v133.

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## Post 3 by @an9 — 2025-04-17T00:48:37Z

To solve the DNS leak problem in `Brave` when using `Windscribe Extension` go to `brave://flags/#brave-adblock-cname-uncloaking` and switch to `Disabled`. I tested it and it worked.

I found out through the recommendation of uBlock Origin, available here:

> **[Dashboard: Settings](https://github.com/gorhill/uBlock/wiki/Dashboard:-Settings#uncloak-canonical-names)**
>
> uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean. - gorhill/uBlock

This recommendation applies to `Brave` because of its`Shield protection`:

> **[Fighting CNAME trickery | Brave](https://brave.com/privacy-updates/6-cname-trickery/)**
>
> Trackers are constantly working on new techniques for evading privacy tools, and keep deploying new ways to evade privacy-protecting tools like the Brave browser. This post discusses a recent technique trackers use, CNAME cloaking, and a new feature...

For some unknown reason this does not apply to ProtonVPN Extension, which does not leak its DNS provider even with this setting enabled, in default post-install mode.

Please do your research before making this change and make an **informed decision about how it might affect the security or privacy** of your Brave Browser.

It still works normally in Firefox (FF), just remember to always activate WebRTC Slayer when installing Windscribe Extension.